CN106477453B - The gantry crane of three pieces open type truss structure crossbeam and the application crossbeam - Google Patents

Abstract

The invention discloses the gantry cranes of a kind of three pieces open type truss structure crossbeam and the application crossbeam, crossbeam includes an on piece truss of two panels side truss and connection two panels side truss, two panels side truss respectively along perpendicular be arranged and it is relatively parallel, upper truss is arranged along horizontal plane, the both sides of the upper truss upper end close proximity with two panels side truss respectively, so that the longitudinal section of crossbeam is downwardly open, not closed square-section, fixation is attached by supporting rack between two panels side truss and an on piece truss.The gantry crane of the three pieces open type truss structure crossbeam and application of the present invention crossbeam, due to the truss structure that its crossbeam is three pieces open type, weight is lighter for traditional four-piece type crossbeam, and stabilized structure, anti-fatigue performance is good, lateral rigidity is more preferable, can be applied to lifting capacity and the higher large-scale gantry crane of working level.

Description

Three-piece open truss structure girder and quay bridge using the girder

technical field

The invention relates to the field of large-scale crane transportation, in particular to a girder with a three-piece open truss structure and a quay bridge using the girder.

Background technique

With the development of the shipping market in the modern world, the container carrier is developing towards the trend of large size and high efficiency. With the emergence of the 18,000 TEU 3E-class "Big Mac" container ship, the supporting ultra-large 3E-class shore-to-shore container bridge crane (hereinafter referred to as the quay crane) has also come out accordingly. Since then, in order to improve the loading and unloading efficiency of 3E-class quay cranes, double-lift 3E-class quay cranes with greater lifting capacity have also been introduced to the market.

Facing the ultra-large quay cranes with large parameters and heavy lifting capacity, the conventional solid-belly design quay cranes can no longer meet the bearing capacity and energy-saving requirements of some wharves due to their heavy weight and large windward area. If the truss structure can It can better reduce the weight and windward area of the quay bridge, reduce the wheel pressure and energy consumption, but the traditional truss girder design has poor lateral stiffness, and more tube structures are used, which has poor energy-saving bearing capacity, is difficult to manufacture, and is difficult to apply to large-scale , large-scale quay cranes with heavy lifting capacity and high working level.

For example, the Chinese patent document with the application number CN200710051552.5 discloses a three-piece or multi-piece truss structural main girder, which relates to a truss structural main girder in a bridge. The side main truss and the middle main truss are connected by cross-connection, the upper deck or parallel connection is on the side main truss and the middle main truss, and the lower deck or parallel connection is on the lower deck, and the side main truss and the middle main truss are connected by the upper chord Rods, lower chords and middle web members, the middle main truss is one or more pieces. The invention is composed of side main trusses and intermediate main trusses, and the middle main trusses are one or more pieces. Two adjacent main trusses are connected by transverse connection, so that the force between the main trusses can be transferred to each other. The invention uses more than two pieces of trusses to bear the force together, which effectively reduces the force of each member of the truss, reduces the cross-section of the members, lowers the requirements for the main truss thick plate, facilitates design, transportation and installation, and reduces project cost; The reaction force of the support is reduced, which is convenient for the design and purchase of the support. The invention can be used in bridges such as continuous girders, arch bridges, cable-stayed bridges, and suspension bridges. However, the truss-structured main girder of this invention includes an upper deck, a lower deck, and multiple main trusses, and a cross-link for connecting two adjacent main trusses is arranged between the multiple main trusses, which is specially designed for bridges. The structure is not suitable for the quay bridge structure.

The Chinese patent document with the application number CN201410048037.1 also discloses a quay bridge with a lifting truss girder and three trolleys, which can realize the lifting function of the quay bridge girder and reduce the lifting height of the quay bridge system to the lifting trolley requirements, reducing the complexity of the container quay crane system, and can improve the loading and unloading efficiency of the container quay crane system. The technical scheme of the invention is: a quay bridge with a lifting truss girder and three trolleys, including a quay bridge girder and a quay bridge girder. The bottom of the gantry column is connected by a connecting beam, and the quay bridge girder is connected with the upper part of the quay bridge gantry. Suspended transfer trolley. In the above-mentioned quay bridge with lifting truss girder and three trolleys, the quay bridge girder is arranged on the inner side of the quay bridge gantry and connected by the girder locking device, and the inner side of the upper part of the quay bridge girder and the outer side of the lower part are equipped with trolley tracks. The two ends of the inner track on the upper part of the quay bridge girder are respectively provided with a quay crane hoisting trolley, and the outer track of the lower part of the quay bridge girder is provided with a suspended transfer trolley; above the four gantry columns, there are two The connecting beam has a pulley block below the connecting beam, a girder lifting mechanism on the connecting beam, and a pulley block above the quay bridge girder. The wire rope on the girder lifting mechanism is connected to the quay bridge girder through the pulley block. In the process of container loading and unloading, the container transfer mode of two quay crane lifting trolleys and one suspended transfer trolley coordinates the operation instead of the traditional container quay crane using a single lifting trolley to lift and transfer containers. It solves the persistent problem of slow hoisting speed of the traditional single lifting trolley, and greatly improves the transfer speed of containers. However, the quay crane in this patent document uses a lifting truss girder, and the girder is integrated, there is no distinction between the front and rear girders. During the service of the quay bridge, the girder cannot be pitched to avoid the passage of ships, which is different from the current use requirements of most quay bridges. Different, the scope of application is limited, and the weight of the main beam structure is too heavy.

Another example is that the Chinese patent document whose application number is CN201320382813.2 provides a triangular truss type double-deck quay bridge girder, which can effectively improve the stiffness of the traveling girder of the crane and the traveling girder of the transfer vehicle, and can effectively prevent deformation and ensure The equipment is safe to operate. The technical solution of the invention: a main girder of a triangular truss-type double-deck quay bridge, including a traveling main girder A of a crane and a main girder B of a crane arranged side by side, and a transfer vehicle is arranged directly below the main girder A of the traveling crane. The main girder A and the main girder B of the crane are provided with the main girder B of the transfer vehicle, and the two sides of the main girder A of the crane and the main girder B of the crane are respectively provided with an auxiliary beam A and an auxiliary beam B. The main beam A of the crane traveling and the auxiliary beam A, the main beam B of the crane traveling and the auxiliary beam B are connected by horizontal triangular support beams, the main beam A of the crane traveling and the main beam A of the transfer vehicle, and the main beam B of the crane traveling It is connected with the main beam B of the transfer vehicle through a vertical triangular support beam, and the main beam A of the transfer vehicle is connected with the auxiliary beam A, and the main beam B of the transfer vehicle is connected with the auxiliary beam B through an oblique triangular support beam. In the above-mentioned triangular truss-type double-deck quay bridge main girders, the main girders traveling by the crane are connected by horizontal triangular support beams, and at the same time, the cross-sectional shape of the main girders traveling by the crane, the main girders traveling on the transfer vehicle and the auxiliary girders is inverted. trapezoidal.

Compared with the prior art, this invention arranges the main girder of the transfer vehicle under the main girder of the crane, so that the traditional crane is only responsible for lifting, while the transfer work is performed by the transfer vehicle. The bank with this structure The container loading and unloading efficiency of the bridge can be increased by 50% compared with the traditional quay crane. Since the invention sets auxiliary beams on both sides of the main beam of the crane, and connects any two adjacent beams through the triangular support beam, it effectively solves the problem of insufficient rigidity of the double-deck quay bridge in the horizontal direction. Moreover, it can effectively prevent the deformation of the main beam of the crane and the main beam of the transfer vehicle, so as to ensure the safe operation of the equipment. However, the main girder structure of this patented technology is a double-layer girder specially designed for quay bridges with double trolleys for lifting and operation. Structural weight is too heavy.

From this point of view, the traditional truss main girder design has poor lateral rigidity, is too heavy, and mostly adopts a tube structure, which has poor energy-saving bearing capacity and is difficult to manufacture. shore bridge.

Contents of the invention

In order to solve the above problems, the object of the present invention is to provide a three-piece open truss structure girder, which includes two side trusses and an upper truss connecting the two side trusses, and the two side trusses are respectively arranged along a vertical plane and relatively parallel , the upper truss is arranged along the horizontal plane, and the two sides of the upper truss are closely connected with the upper ends of the two side trusses respectively, so that the longitudinal section of the girder is a downward-opening, unclosed square section. The connection is fixed by the support frame.

Further, each of the two side trusses includes upper and lower parallel upper chords and lower chords, and a plurality of side webs are vertically arranged between the upper chords and the lower chords, and the side webs connect the upper chords and the lower chords.

Preferably, the upper truss includes two side bars composed of two upper chords of two side trusses, a plurality of upper struts are arranged horizontally between the two side bars, and the upper struts connect the two side bars.

Further, the plurality of flank rods and/or the plurality of upper struts form a triangular, "N"-shaped, "K"-shaped or Pozi-shaped structure.

Preferably, the support frame is a tripod structure composed of three support rods, and its three corners are respectively fixed on two side web rods and an upper support rod, and the two side web rods are respectively located in two side trusses, and one The upper struts are connected to the upper chord at the upper ends of the two side webs, and the plane where the support frame is located is perpendicular to the plane where the side trusses are located.

Further, the support frame is a triangular structure formed by two support rods and a side truss. The top of one side web bar is connected, the other side web bar and one side web bar have the same position in the length direction of the girder and are parallel to each other, and the apex angle of the triangular structure is located between the top of one side web bar and the upper strut The two bottom corners are fixed on one side web bar and the other side web bar respectively, and the plane where the support frame is located is perpendicular to the plane where any side truss is located.

Preferably, the two bottom angles of the support frame are both higher than the plane formed by the two bottom chords in the vertical direction.

Further, the inner side of the bottom chord is provided with a track for the load-carrying device to slide.

Preferably, the top chord and/or the flanks are made of I-shaped steel or H-shaped steel.

The invention also discloses a quay bridge, which includes a gantry, a girder fixed on the gantry, a ladder frame, and a plurality of pull rods for pulling the girder. The upper beam, the girder is fixed on the bottom of the upper beam, the ladder frame is fixed above the door frame, the upper end of the tie rod is connected to the ladder frame, and the lower end is connected to the girder. The girder adopts the above-mentioned three-piece open truss structure girder.

Further, the girder includes a sea-side girder and a land-side girder that are rotatably connected to each other, and the sea-side girder is connected to the land-side girder through a double hinge shaft system.

Preferably, the land side girder is fixed to the bottom of the upper cross girder through connecting joints and auxiliary support rods.

Further, the connection joint includes a closed box, the front and rear panels of the closed box respectively extend upwards with a first protrusion along a vertical plane, and the upper panel extends a second protrusion along a horizontal plane.

Preferably, the width of the closed box in the left-right direction is the same as that of the section of the upper beam in the left-right direction, and the thickness of the closed box in the front-rear direction is the same as the width of the section of the top chord in the front-back direction.

Furthermore, a connecting plate is provided at the position where the bottom of the upper beam is connected to the connecting joint. When the land side girder and the upper beam are fixed, the connecting plate is connected with the edge of the first protrusion and the upper panel to form a whole.

Preferably, the second convex part extends along the horizontal surface of the upper panel to the left and right sides respectively, so as to be fixedly connected to the upper chord on the left and right sides of the upper panel, and the left and right bottom edges of the bottom surface of the closed box are connected to the upper chord through the auxiliary support rod. Fixedly connected to the bottom chord.

Further, a gusset plate is provided on the connection joint, and the gusset plate is fixedly connected to the ladder frame through the support pipe.

Preferably, the second protrusion extends left or right along the horizontal surface of the upper panel, so as to be fixedly connected to the upper chord on the left or right side of the upper panel; when the second protrusion extends left, the closed The left bottom edge of the box bottom is fixedly connected with the upper chord and the lower chord through the auxiliary support rod, and the right bottom edge of the closed box bottom is fixedly connected with the lower chord and the upper hinge shaft through the auxiliary support rod; when the second convex When the bottom of the closed box extends to the right, the right bottom edge of the bottom of the closed box is fixedly connected with the upper chord and the lower chord through the auxiliary support rod, and the left bottom edge of the bottom of the closed box is connected with the lower chord and the upper hinge through the auxiliary support rod. Fixed connection at the shaft.

As above, the girder of the three-piece open truss structure of the present invention and the quay bridge using the girder, because the girder is a three-piece open truss structure, is lighter in weight and stable in structure compared to the traditional four-piece girder. It has good fatigue resistance and better lateral rigidity, and can be applied to large-scale quay cranes with higher lifting capacity and higher working level.

In order to make the above-mentioned content of the present invention more comprehensible, preferred embodiments are specifically cited below and described in detail in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of a three-piece open truss structure girder according to the first embodiment of the present invention;

Figure 2-1 is a schematic diagram of the overall structure of the landside girder in Figure 1;

Figure 2-2 is the A-direction view of Figure 2-1;

Figure 2-3 is a view from direction B of Figure 2-1;

Figure 3-1 is a schematic diagram of the overall structure of the sea side girder in Figure 1;

Figure 3-2 is the A-direction view of Figure 3-1;

Figure 3-3 is a view from direction B of Figure 3-1;

Figure 4-1 is a C-C sectional view of the girder in Figure 1;

Figure 4-2 is another C-C sectional view of the girder in Figure 1;

Fig. 5 is a schematic diagram of the overall structure of the quay bridge using three open truss structure girders according to the second embodiment of the present invention;

Fig. 6 is a partially enlarged schematic diagram of a quay bridge applying a three-piece open truss structure girder and its double-hinge shaft connection according to the second embodiment of the present invention;

Fig. 7 is a partial enlarged schematic diagram of the connection joint of the girder in Fig. 5;

Figure 8-1 is the front view of Figure 7;

Figure 8-2 is the rear view of Figure 7;

Fig. 8-3 is a D-D sectional view of Fig. 7;

Fig. 9 is another partially enlarged schematic diagram of the connecting joint of the girder in Fig. 5 .

Component label description:

Two side trusses 1a, 1b

Upper Truss 2

Two side bars 2a, 2b

support frame 3

Chord 4

bottom chord 5

Flank Rod 6

upper strut 7

track 8

Support rod 3a 3b 3c 3d 3e

Door frame 101 Door frame column 101a Upper beam 101b

Girder 102 Sea side girder 102a Land side girder 102b

Ladder frame 103

Tie rod 104

Double hinge system 105

Connection joint 106 First protrusion 106a Second protrusion 106b

Auxiliary support rod 107

Connecting plate 108

gusset plate 109

Support tube 110

Detailed ways

The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be presented in conjunction with a preferred embodiment, it does not mean that the features of the invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiments is to cover other options or modifications that may be extended based on the claims of the present invention. The following description contains numerous specific details in order to provide a thorough understanding of the present invention. The invention may also be practiced without these details. Also, some specific details will be omitted from the description in order to avoid obscuring or obscuring the gist of the present invention.

In addition, "upper", "lower", "left", "right", "top", and "bottom" used in the following description should not be construed as limiting the present invention.

【The first embodiment】

As shown in Figure 1, the first embodiment of the present invention provides a three-piece open truss structure girder, including two side trusses 1a and 1b, an upper truss 2 connecting the two side trusses 1a and 1b, and two side trusses 1a and 1b. The trusses 1a and 1b are respectively arranged along the vertical plane and are relatively parallel. The upper truss 2 is arranged along the horizontal plane. Open, not closed square section, two side trusses 1a and 1b and one upper truss 2 are connected and fixed through a support frame 3 .

Specifically, the three-piece open truss structure girder in the embodiment of the present invention can be applied to a quay bridge. Generally speaking, a quay bridge includes a sea side girder close to the sea side and a land side girder close to the land side. Fig. 2-1 is a structural schematic diagram of the three-piece open truss structure girder of the present invention as a land side girder, Fig. 2-2 is a view from the direction A of Fig. 2-1, and Fig. 2-3 is a view from the direction B of Fig. 2-1 ; Fig. 3-1 is a structural schematic view of the three-piece open truss structure girder of the present invention as the sea side girder, Fig. 3-2 is the A-direction view of Fig. 3-1, and Fig. 3-3 is the B-direction of Fig. 3-1 Views; Figure 4-1 and Figure 4-2 are C-C cross-sectional views of the three-piece open truss structure girder of the present invention. As shown in the accompanying drawings, the longitudinal section of the girder of the three-piece open truss structure of the present invention is a downwardly open, unclosed square section. The girder currently used on the quay bridge is usually a four-piece structure girder, that is, its cross section is a closed rectangular cross section, or a triangular structure truss girder, that is, its cross section is a closed triangular cross section. The above-mentioned three-piece open truss structure girder provided by the first embodiment of the present invention is lighter in weight, better in stability and better in lateral stiffness than four-piece structure or triangular structure girders, making its application range wider. It is widely used in quay cranes with an outreach of less than 75m and a lifting capacity of less than 80t. Preferably, it can be applied to large and extra-large quay cranes with an outreach of 60m-75m and a lifting capacity of 65t-80t.

Further, as shown in Fig. 2-1 and Fig. 3-1, the two side trusses 1a and 1b each include upper and lower parallel upper chords 4 and lower chords 5, and the distance between the upper chord 4 and the lower chord 5 is along the vertical direction. A plurality of flank rods 6 are provided, and the flank rods 6 connect the upper chord 4 and the lower chord 5 . Specifically, the two ends of each side web bar 6 are respectively fixed on the upper chord 4 and the lower chord 5, and a plurality of side web bars 6 are connected end-to-end to form a plurality of triangles between the upper chord 4 and the lower chord 5. structure, or form a plurality of "N"-shaped structures; it is also possible to form a "K"-shaped structure with multiple flanks 6 between the upper chord 4 and the lower chord 5 in groups of three, and multiple sets of "K"-shaped structures The flank rods 6 are used to connect the upper chord 4 and the lower chord 5; or a plurality of flank rods 6 form a Pozi-shaped structure between the upper chord 4 and the lower chord 5. The side trusses of the truss structure in the first embodiment of the present invention are not limited to the shapes listed above, and can also be other structures that can play the same connection function.

Furthermore, as shown in Figure 2-2 and Figure 3-2, the upper truss 2 of the three-piece open truss structure girder of the present invention includes two upper chords 4 composed of two side trusses 1a and 1b. There are two side bars 2a and 2b, and a plurality of upper struts 7 are arranged horizontally between the two side bars 2a and 2b, and the upper struts 7 connect the two side bars 2a and 2b. More specifically, the two ends of each upper strut 7 are respectively fixed on two side bars 2a and 2b, and a plurality of upper struts 7 are connected end-to-end in pairs to form a plurality of side bars 2a and 2b. a triangular structure, or form a plurality of "N"-shaped structures; it is also possible to form a "K"-shaped structure with multiple upper struts 7 between the two side bars 2a and 2b in groups of three, and multiple groups of "K" The upper struts 7 of the glyph structure are used to connect the two side bars 2a and 2b; or a plurality of upper struts 7 form a rice-shaped structure between the two side bars 2a and 2b. The upper trusses of the truss structure in the first embodiment of the present invention are not limited to the shapes listed above, and can also be other structures that can play the same connection function.

Preferably, as shown in Figure 4-1, the support frame 3 can be a tripod structure composed of three support rods 3a, 3b and 3c, and its three corners are respectively fixed on two side web rods and an upper support rod , the two side webs are respectively located in the two side trusses 1a and 1b, and the two ends of the upper strut are respectively connected to the upper chords 2a(4) and 2b(4) at the upper ends of the two side webs, The plane where the support frame 3 is located is perpendicular to the plane where the side trusses 1a or 1b are located. For example, when multiple side webs of two side trusses respectively form a triangular structure, two side webs that are in the same position in the length direction of the girder and parallel to each other can be selected from the two side trusses, and the two side webs connected parallel to each other can be selected. An upper strut at the upper end of the side web bar fixes the three corners of the tripod structure to the selected side web bar and the upper strut respectively to form a stable structure, thereby enhancing the lateral stiffness of the girder. Wherein, the top angle of the tripod structure can be located at any position of the selected upper brace, preferably, the top angle of the tripod structure is located at the midpoint of the selected upper brace.

As shown in Figure 4-2, the support frame 3 is a triangular structure composed of two support rods 3d and 3e and a side web bar. The bar is connected to the top end of another side web bar in the other side truss 1a, and the position of the other side web bar and the one side web bar in the length direction of the girder is the same and parallel to each other. The vertex angle of the triangular structure Located at the connection between the top of the one side web bar and the upper brace, its two bottom corners are respectively fixed on the one side web bar and the other side truss 1a at the same position in the length direction of the girder. On a side web bar, the plane where the support frame 3 is located is perpendicular to the plane where the side truss 1a or 1b is located. For example, when multiple side webs of two side trusses respectively form a triangular structure, two side webs on the left and right sides at the same position in the length direction of the girder and parallel to each other can be selected from the two side trusses, and the two side webs connecting the two sides can be selected. An upper strut at the upper end of two parallel flank rods, the top angle of the triangular structure is located at the connection between the top of one of the flank rods and the upper strut, and one of the bottom angles is located at the middle part of the flank rod, The other bottom corner is located in the middle of the side web bar on the other side at the same position in the length direction of the girder, forming a stable structure, thereby enhancing the lateral rigidity of the girder. Preferably, the two bottom corners should be as low as possible close to the bottom chord to provide as much support strength as possible.

In the embodiment of the present invention, as shown in Fig. 4-1 and Fig. 4-2, the two bottom angles of the support frame 3 are higher than the plane formed by the two bottom chords 5 in the vertical direction. Such a structure is conducive to setting a track on the lower chord 5 for the sliding of load-carrying devices such as trolleys while ensuring the lateral rigidity of the girder. Further, the inner side of the lower chord 5 is provided with a track 8 for the load-carrying device to slide. If the track 8 is arranged on the inner side of the lower chord 5, a wider distance between the two side trusses 1a and 1b is required, so that this structure can be further strengthened. The lateral stiffness of the main girder of the three-piece open truss structure of the first embodiment of the invention.

Preferably, in the first embodiment of the present invention, both the top chord 4 and/or the flank 6 are made of I-shaped steel or H-shaped steel. The I-beams or H-beams used for the top chord 4 and/or the flanks 6 have the same cross-sectional internal height, and the use of I-beams or H-beams of the same height can improve the bearing capacity or fatigue resistance of the girder, and has better practical value.

【Second Embodiment】

As shown in Fig. 5, the second embodiment of the present invention discloses a quay bridge, comprising a portal frame 101, a girder 102 fixed on the portal frame, a ladder frame 103, a plurality of pull rods 104 for pulling the girder 102, and the portal frame 101 It includes a vertically arranged gantry column 101a and an upper beam 101b horizontally connected to the upper end of the gantry column, the girder 102 is fixed on the bottom of the upper beam 101b, the ladder frame 103 is fixed above the door frame 101, and the upper end of the tie rod 104 is connected to the ladder frame The upper and lower ends of 103 are connected to the girder 102, and the girder 102 adopts a three-piece open truss structure girder as shown in Fig. 1-1 or Fig. 2-1.

Specifically, the three-piece open truss structure girder includes two side trusses 1a and 1b, an upper truss 2 connecting the two side trusses 1a and 1b, and the two side trusses 1a and 1b are respectively arranged along a vertical plane and relatively parallel , the upper truss 2 is arranged along the horizontal plane, and the two sides of the upper truss 2 are closely connected with the upper ends of the two side trusses 1a and 1b respectively, so that the longitudinal section of the girder is a square section that opens downward and is not closed, and the two side trusses 1a and 1b are connected and fixed with a piece of upper truss 2 through a support frame 3 .

The three-piece open truss girder structure of the second embodiment of the present invention is applicable to quay bridges with an outreach of less than 75m and a lifting capacity of less than 80t. Large and extra-large quay cranes with a weight of 65t-80t.

Further, the quayside bridge girder of the second embodiment of the present invention includes a sea side girder 102a and a land side girder 102b that are rotatably connected to each other, and one or both of the sea side girder 102a and the land side girder 102b can adopt the three-dimensional structure of the present invention. Open sheet truss structure girder. When both the sea side girder 102a and the land side girder 102b adopt the three-piece open truss structure girder of the present invention, as shown in FIG. 5 and FIG. connect. Since the lower opening of the three-piece open truss structure, that is, the position of the lower chord is not closed, if only a single hinge is installed at the lower chord, then the hinge cannot bear the lateral load, and the lateral stability of the girder cannot be guaranteed; If only a single hinge axis is set near the upper chord, due to the vertical downward deflection of the girder, the foreland side girder will interfere with the part below the hinge axis; Double hinge shafts must be used, and the lower hinge shaft should be set at the lower chord to ensure that there will be no interference after the girder deflects vertically; the upper hinge shaft can be used to help bear the direction-finding load to further enhance the lateral stiffness of the girder.

Further, the land side girder 102b is fixed to the bottom of the upper cross girder 101b through a connection joint 106 and an auxiliary support rod 107 . As shown in Fig. 7, Fig. 8-1 to Fig. 8-3, the connection joint 106 includes a closed box, and the front and rear panels of the closed box respectively extend upwards along the vertical plane with a first protrusion 106a, The upper panel of the closed box extends a second protrusion 106b along a horizontal plane. A connection plate 108 is also provided at the position where the bottom of the upper beam 101b is connected to the connection joint 106. When the land side girder 102b is fixed to the upper beam 101b, the edge of the connection plate 108 and the first convex portion 106a, and the closed box The upper panel of the body is connected to form a whole.

More specifically, as shown in FIG. 7, the width of the closed box in the left-right direction (L-L direction in FIG. 7) is the same as the width of the cross-section of the upper beam 101b in the left-right direction, and the closed box is in the front-to-back direction. The thickness in the direction (A-B direction in FIG. 7 ) is the same as the width in the front-rear direction of the section of the top chord 4 .

Preferably, the second convex portion 106b extends along the horizontal surface of the upper panel to the left and right sides respectively, so as to be fixedly connected to the upper chord on the left and right sides of the upper panel, and the left and right bottom edges of the closed box bottom pass through the auxiliary support rod 107 They are respectively fixedly connected to the upper chord and the lower chord, and the auxiliary support rod 107 can be the structure shown in Figure 8-1 to Figure 8-3, or can be other structures that play the same connection role. Furthermore, a gusset plate 109 is also provided on the connection joint 106 , and the gusset plate 109 is fixedly connected to the ladder frame 103 through the support tube 110 .

In the shore bridge provided in this embodiment, the second convex part 106b may also extend leftward or rightward along the horizontal surface of the upper panel, so as to be fixedly connected to the upper chord on the left or right side of the upper panel. When the second convex portion 106b extended to the left, as shown in FIG. It is fixedly connected with the lower chord, and the bottom edge on the right side of the closed box bottom, that is, the bottom edge on the different side from the second protrusion 106b, is fixedly connected with the lower chord and the upper hinge shaft through the auxiliary support rod 107. Similarly, when the second convex portion 106b extends to the right, the bottom edge on the right side of the bottom surface of the closed box, that is, the bottom edge on the same side as the second convex portion 106b, is fixed to the upper chord and the lower chord through the auxiliary support rod 107 connected, and the bottom edge on the left side of the bottom surface of the closed box body, that is, the bottom edge on the side different from the second convex portion 106b, is fixedly connected to the lower chord and the upper hinge shaft through the auxiliary support rod 107. Here, preferably, the bottom edge on the side different from the second convex portion 106b is fixedly connected to the lower chord and the upper hinge respectively through two auxiliary support rods 107, so as to improve the bearing capacity of the closed box.

Further, as shown in Fig. 2-1 and Fig. 3-1, the two side trusses 1a and 1b each include upper and lower parallel upper chords 4 and lower chords 5, and the distance between the upper chord 4 and the lower chord 5 is along the vertical direction. How many flank rods 6 are provided, and the flank rods 6 are connected? Upper chord 4 and lower chord 5. Specifically, the two ends of each side web bar 6 are respectively fixed on the upper chord 4 and the lower chord 5, and a plurality of side web bars 6 are connected end-to-end to form a plurality of triangles between the upper chord 4 and the lower chord 5. structure, or form a plurality of "N"-shaped structures; it is also possible to form a "K"-shaped structure with multiple flanks 6 between the upper chord 4 and the lower chord 5 in groups of three, and multiple sets of "K"-shaped structures The flank rods 6 are used to connect the upper chord 4 and the lower chord 5; or a plurality of flank rods 6 form a Pozi-shaped structure between the upper chord 4 and the lower chord 5. The side trusses of the truss structure in the second embodiment of the present invention are not limited to the shapes listed above, and can also be other structures that can play the same connection function.

Further, as shown in Fig. 2-2 and Fig. 3-2, the upper truss 2 of the three-piece open truss structure girder of the present invention includes two upper chords 4 composed of two side trusses 1a and 1b. There are two side bars 2a and 2b, and a plurality of upper struts 7 are arranged horizontally between the two side bars 2a and 2b, and the upper struts 7 connect the two side bars 2a and 2b. More specifically, the two ends of each upper strut 7 are respectively fixed on two side bars 2a and 2b, and a plurality of upper struts 7 are connected end-to-end in pairs to form a plurality of side bars 2a and 2b. a triangular structure, or form a plurality of "N"-shaped structures; it is also possible to form a "K"-shaped structure with multiple upper struts 7 between the two side bars 2a and 2b in groups of three, and multiple groups of "K" The upper struts 7 of the glyph structure are used to connect the two side bars 2a and 2b; or a plurality of upper struts 7 form a rice-shaped structure between the two side bars 2a and 2b. The upper trusses of the truss structure in the second embodiment of the present invention are not limited to the shapes listed above, and can also be other structures that can play the same connection function.

Preferably, as shown in Figure 4-1, the support frame 3 can be a tripod structure composed of three support rods 3a, 3b and 3c, and its three corners are respectively fixed on two side web rods and an upper support rod , the two side web bars are respectively located in the two side trusses 1a and 1b, the two ends of the upper strut are respectively connected to the upper ends of the two side web bars, and the plane where the support frame 3 is located is perpendicular to the side truss 1a Or the plane where 1b is located. For example, when multiple side webs of two side trusses respectively form a triangular structure, two side webs parallel to each other at the same position in the length direction of the girder can be selected from the two side trusses, and two side webs connected parallel to each other can be selected. An upper strut at the upper end of the side web bar fixes the three corners of the tripod structure to the selected side web bar and the upper strut respectively to form a stable structure, thereby enhancing the lateral stiffness of the girder. Wherein, the top angle of the tripod structure can be located at any position of the selected upper brace, preferably, the top angle of the tripod structure is located at the midpoint of the selected upper brace.

As shown in Figure 4-2, the support frame 3 is a triangular structure composed of two support rods 3d and 3e and a side web bar. The side web bar is located in one of the side trusses 1b, and its top end passes through an upper The strut is connected with the top end of another side web bar in the other side truss 1a, and the position of the other side web bar and the one side web bar in the length direction of the girder is the same and parallel to each other, and the top of the triangular structure The corner is located at the connection between the top end of the one side web bar and the upper brace, and its two bottom corners are respectively fixed on the side web bar and the other side of the other side truss 1a at the same position in the length direction of the girder. On the web, the plane where the support frame 3 is located is perpendicular to the plane where the side truss 1a or 1b is located. For example, when multiple side webs of two side trusses respectively form a triangular structure, two side webs with the same position in the length direction of the girder and parallel to each other can be selected from the two side trusses, and the apex angle of the triangular structure is located on this side At the connection between the top of the web bar and the upper strut, one of the bottom corners is located in the middle of the side web bar, and the other bottom corner is located in the middle of the side web bar at the same position on the other side in the length direction of the girder, forming a stable In order to strengthen the lateral rigidity of the beam, preferably, the two bottom corners should be as low as possible close to the bottom chord, so as to provide the largest possible support strength.

In the embodiment of the present invention, as shown in FIG. 4-1 and FIG. 4-2 , the plane where the two bottom corners of the support frame 3 are located is higher than the plane formed by the two bottom chords 5 . Such a structure is conducive to setting a track on the lower chord 5 for the sliding of load-carrying devices such as trolleys while ensuring the lateral rigidity of the girder. Further, the inner side of the lower chord 5 is provided with a track 8 for the load-carrying device to slide. If the track 8 is arranged on the inner side of the lower chord 5, a wider distance between the two side trusses 1a and 1b is required, so that this structure can be further strengthened. The lateral stiffness of the main girder of the three-piece open truss structure of the second embodiment of the invention.

Preferably, in the second embodiment of the present invention, one or more of the top chord 4 and/or the flank 6 uses I-shaped steel or H-shaped steel. The I-shaped steel or H-shaped steel used for the top chord 4 and/or the flank 6 has the same cross-sectional internal clear height, and the use of the I-shaped steel or H-shaped steel with the same height can improve the bearing capacity or fatigue resistance of the girder, and has a better Good practical value.

In summary, using the three-piece open truss structure girder of the present invention and the quay bridge using the girder, since the girder is a three-piece open truss structure, it is lighter in weight compared to the traditional four-piece girder. Moreover, the structure is stable, the fatigue resistance is good, and the lateral rigidity is better. It can be applied to large-scale quay cranes with higher lifting capacity and higher working level, and has high practical value. The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims (16)

1. A three-piece open truss structure girder is used for a quay bridge, and the quay bridge includes a portal frame, and the portal frame includes a vertically arranged portal column and an upper beam horizontally connected to the upper end of the portal column, It is characterized in that it includes two side trusses and an upper truss connecting the two side trusses, the two side trusses are respectively arranged along a vertical plane and relatively parallel, the upper truss is arranged along a horizontal plane, and the upper truss The two sides are respectively closely connected with the upper ends of the two side trusses, so that the longitudinal section of the girder is a downwardly open, unclosed square section, and the support frame is passed between the two side trusses and the one upper truss To connect and fix; The quay bridge also includes a landside girder, which is the three-piece open truss structure girder, and the landside girder is connected to the bottom of the upper beam through a connecting joint and an auxiliary support rod; The connecting joint includes a closed box body, the front and rear panels of the closed box body respectively extend upwards with a first protrusion along a vertical plane, and the upper panel extends a second protrusion along a horizontal plane. 2. The three-piece open truss structure girder according to claim 1, wherein each of the two side trusses includes an upper chord and a lower chord that are parallel up and down, and the upper chord and the lower chord are along the A plurality of flank rods are arranged in the vertical direction, and the flank rods connect the upper chord and the lower chord. 3. The three-piece open truss structure girder according to claim 2, wherein the upper truss comprises two left and right parallel side bars formed by the two upper chords of the two side trusses, A plurality of upper struts are arranged horizontally between the two side bars, and the upper struts are connected to the two side bars. 4. The three-piece open truss structure girder according to claim 3, characterized in that, the plurality of side web bars and/or the plurality of upper struts form a triangle, "N" type, "K" type Or Mi-shaped structure. 5. The three-piece open truss structure girder according to claim 3, wherein the support frame is a tripod structure composed of three support rods, and its three corners are respectively fixed to two side web rods and a On the upper strut, the two side webs are respectively located in the two side trusses, and the two ends of the one upper strut are respectively connected to the upper chord at the upper ends of the two side webs, And the plane where the support frame is located is perpendicular to the plane where any one of the side trusses is located. 6. The three-piece open truss structure girder according to claim 3, wherein the support frame is a triangular structure formed by two support rods and a side web bar, and the one side web bar is located in one of the In the side truss, its top end is connected with the top end of another side web bar in the other side truss through an upper brace, and the other side web bar is connected to the one side web bar The positions in the length direction of the girder are the same and parallel to each other. The top angle of the triangular structure is located at the connection between the top of the one side web bar and the upper strut, and the two bottom angles are respectively fixed to the one The root side web bar and the other side web bar, and the plane where the support frame is located is perpendicular to the plane where any one of the side trusses is located. 7. The three-piece open truss structure girder according to claim 5 or 6, wherein the two bottom angles of the support frame are both higher than the plane formed by the two bottom chords in the vertical direction. 8. The three-piece open truss structure girder according to claim 7, characterized in that, the inner side of the bottom chord is provided with a track for the load-carrying device to slide. 9. The three-piece open truss structure girder according to claim 2, characterized in that, the top chord and/or the side webs are made of I-shaped steel or H-shaped steel. 10. A quay bridge, comprising a gantry, a girder and a ladder frame fixed on the gantry, a plurality of pull rods for pulling the girder, the gantry includes a vertically arranged gantry column and a horizontally connected The upper beam at the upper end of the gantry column, the girder is fixed on the bottom of the upper beam, the ladder frame is fixed above the door frame, the upper end of the pull rod is connected to the ladder frame, and the lower end is connected to the The above-mentioned girder is characterized in that the girder adopts the three-piece open truss structure girder as described in any one of claims 2-9. 11. The shore bridge according to claim 10, characterized in that, the girder comprises a sea side girder and a land side girder which are rotatably connected to each other, and the sea side girder is connected with the land side girder through a double hinge shaft system . 12. The quay bridge according to claim 10, characterized in that, the width of the closed box in the left and right direction is the same as the width of the cross-section of the upper beam in the left and right direction, and the front and rear of the closed box The thickness in the direction is the same as the width in the front-back direction of the section of the top chord. 13. The quay bridge according to claim 10, characterized in that, a connecting plate is provided at the position where the bottom of the upper beam is connected to the connecting joint, when the land side girder is fixed to the upper beam , the connecting plate is connected with the edge of the first protrusion and the upper panel to form a whole. 14. The quay bridge according to claim 10, characterized in that, the second protrusion extends along the horizontal surface of the upper panel to the left and right sides respectively, so as to be fixedly connected to the left and right sides of the upper panel respectively The upper chord, the left and right bottom edges of the bottom surface of the closed box are fixedly connected to the upper chord and the lower chord through the auxiliary support rod. 15. The shore bridge according to claim 14, wherein a gusset plate is provided on the connecting joint, and the gusset plate is fixedly connected to the ladder frame through a support tube. 16. The shore bridge according to claim 10, wherein the second protrusion extends leftward or rightward along the horizontal surface of the upper panel, so as to be on the left side or right side of the upper panel fixedly connected to the upper chord; when the second protrusion extends to the left, the left bottom edge of the bottom surface of the closed box is fixed to the upper chord and the lower chord through the auxiliary support rod connected, the bottom edge on the right side of the bottom surface of the closed box is fixedly connected with the lower chord and the upper hinge shaft through the auxiliary support rod; when the second convex part extends to the right, the closed box The right bottom edge of the box bottom is fixedly connected to the upper chord and the lower chord through the auxiliary support rod, and the left bottom edge of the closed box bottom is connected to the lower chord through the auxiliary support rod. And fixed connection at the hinge shaft.